Processes and products



United States This invention relates to esters of 2-carboxyiminoor thiocarboxyimino-3-benzothiazoline or -benzoxazoline carboxylic acids; to a process for the preparation of these esters; and to fungicidal compositions and methods employing these esters.

It has been found thatcompounds represented by the following formula possess outstanding fungicidal activity: (1) Xi QM oar-pane X4 2 X wherein Z is selected from the group consisting of hydrogen and nitro; Q is a halogen, that is chlorine, fluorine, bromine or iodine; n is a whole positive integer of less than 4, that is l, 2 or 3; X, X X X and X, can be the same or different and are selected from the group consisting of oxygen and sulfur; and R and R" can be the same or different and are alkyl or alkenyl groups containing less than carbon atoms.

From the standpoint of ease and economy of preparation and effectiveness of usage, those compounds represented by Formula 1 wherein X is sulfur and X X X and X are oxygen are the preferred compounds. 'Also, from the standpoint of ease and economy-of preparation, the better compounds are those where R and R" same and are methyl or ethyl.

In accordance with the present invention, it has been found that the compounds of Formula 1 can be prepared rapidly and in high yield by reacting the hydrochloride salt of a suitably substituted 2-aminobenzothiazole or 2- aminobenzoxazole with a lower alkanol chloroformate or thiochloroformate in aqueous medium as illustrated by the following equation:

chloric acid can be tolerated, the use of any substantial excess of hydrochloric acid should be avoided.

In carrying out the reaction of Equation 2, the tempera ture ordinarily is maintained at about room temperature. While temperatures as low as about C., or even somewhat lower c-an be used in this reaction, they are not reaction rates.

preferred because they give decreased are the aten t Ofitice 'cated in Equation 2.

Patented Sept. 9, 1958 Likewise, while relatively high temperatures can be employed, they are ordinarily avoided because they bring about excessive decomposition of the chloroformate. In general, the temperature employed is in the range of about 20-60 with a temperature of about 3055 C. being about the best from the standpoint of reaction rate and minimum chloroformate decomposition.

For this reaction to proceed satisfactorily, it has been found that the pH of the reaction mass must be maintained within the range pH 2.0 to 6.0. For the optimum yield of high purity material a pH Within the range of 3.0 to 5.0, and more preferably from 3.5 to 4.0 is employed. If a pH lower than about 2.0 is employed, the reaction rate is considerably slowed. On the other hand, pHs above about 6.0 cannot be used because the amine hydrochloride does not exist in appreciable amounts at higher pHs.

To maintain the pH within the required range, it is necessary to add an acid acceptor to the reaction medium. For this purpose excellent results are obtained by adding an alkali or alkaline earth metal base. The alkali or alkaline earth metal base may be in the form of a hydroxide such as sodium or potassium hydroxide. Alternatively, basic salts such as sodium acetate, basic phosphates, carbonate and bicarbonate salts, and tertiary amines can be used. The carbonate and bicarbonate salts are sometimes less desirable because the evolution of carbon dioxide tends to form a foam.

To give substantially complete reaction with the amine hydrochloride, a minimum mole ratio of alkanol chloroformate to amine hydrochloride of 2 is required, as is indi- Ordinarily, however, a mole ratio of from about 2.0 to 4.0 is used to allow for some hydrolysis of the alkanol chloroformate.

Because this reaction proceeds rapidly to give a substantially pure product that can be recovered by simple filtration, it is ideally suited for continuous operation. For example, it can be operated on a large commercial scale in a pipe reactor. The reactants are introduced into one end of the reactor, with the reaction product leaving the other end to be filtered, dried and packaged. The acid acceptor that is required for pH control is introduced at several spaced locations along the length of the pipe reactor. In this manner large quantities of product can be obtained simply and rapidly without requiring extensive equipment.

It should be pointed out that ordinarily this process is carried out to produce a single compound symmetrically substituted by the chloroformate group; that is, X and X, are the same, X and X, are the same, and R and R are the same. However, in many instances it is desirable to form unsymmetrical compounds. This can be done by using a mixture of chloroformates in preparing the compounds. Thus, where a mixture of methyl and ethyl chloroformates are employed, four products are produced, namely the compounds where R and R are both methyl or 'both ethyl, and the compounds where R is methyl and R is ethyl, or R is ethyl and R is methyl. These mixed products can be employed as such in the fungicidal compositions and methods of the present invention. Alternatively, they can be separated to isolate high purity unsymmetrical compounds.

As aforementioned, it has been found that the compounds represented by Formula 1 possess outstanding fungicidal activity. Specifically, it has been found that these compounds not only control a wide variety of fungus 3 applied to the soil to give control of fungus infestation of the aerial parts of the plant.

In practicing the fungicidal methods of our invention, one or more of the active ingredients is applied to the organic material to be treated for the control of fungi at a dosage sufficient to exert fungicidal action. Accordingly, our compositions and methods are applicable for the protection of carbohydrates, proteins and fats. They are particularly suited for the treating of plants such seeds, vegetables, ornamental plantsand fruit-searing trees. Some of these compositions are also effective when applied directly to the soil for controlling plant fungi. Also they can be used to treat organic fibers and fabrics and various cellulo'sic material such as leather and Wood. Likewise they can be used to treat paints and lubricating oils.

In application to plants, fungicidal control is obtained in most instances by applying the active compound at a dosage or rate from about 0.5 to 10.0 pounds per acre, the optimum amount within this range being largely dependent upon the variables mentioned heretofore. In application directly to the soil for use as a systemic fungicide, inmost instances, the dosage or rate is from about 1 to 75 pounds per acre. The optimum dosage can be determined in each instance by one of the means conventional inthe art. It is, of course, determined by and dependent upon the particular fungicidal compound selected, the method of application, and, in the case of application to vegetation, the state and condition 'of growth of the vegetation to be treated, and the climatic conditions.

The fungicidal compositions of our invention contain in suflicient amount to exert fungicidal action one or more of the above-described active compounds in admixture with a carrier material or conditioning agen't'of the kind used and commonly referred to in thefart as a fungicide adjuvant or modifier. The conventional fungicide adjuvants are inert solids, hydrocarbon liquid diluents and surface-active agents. Theyprovide formulations adapted for ready and eflicient application using conventional applicator equipment. Usually from about 1'95% by weight of the fungicidal composition is active ingredient.

Solid compositions are preferably in the form of powders. They are compounded as homogeneous powders that can be either used as such, diluted with inert solids to form dusts, or suspended-in a suitable liquid medium for spray application. The powders usually comprise active ingredient admixed with minor amounts 'of conditioning agent. Natural clays, either -adsorpti've-such as attapulgite or relatively non-absorptive such as kaolin clays, diatomaceous earth, walnut shell 'fiour, tobacco dust, redwood flour, synthetic fine silica,'calcium silicate and other inert solid carriers of the kind conventionally employed in powder fungicidal compositions can be used. The active ingredient usually makes up fromabout 25- 90% of these powder compositions. For conversion of the powders to dusts, talc, :pyrophyllite, tobacco dust, volcanic ash and other dense, rapid-settling inert solids customarily are used.

Liquid compositions employing one or more of the fungicidally-active ingredients are prepared by admixing the active ingredient with a suitable liquid diluent medium. The active ingredient can be either-in solution or in suspension in the liquid medium. Typical of the-liquid 5 31, Nos.'7 (1955).

media commonly employed as fungicide :adjuvants are kerosene, Stoddard solvent, xylene, alcohols, alkylated naphthalene and glycols. The active ingredient usually makes up from about 0.5 to 50% of these liquid compositions. Some of these "compositions arei'cl'e'signed' fo be used as such, and others to be extended with'larg'e'quantitles of water.

Compositions in the form of wettable powders or liquids in many cases also include one'or more su'r fa'ceactive agents such as wetting, dispersing or emulsifying agents. These materials cause the compositions 'to 'disperse or emulsify easily'in *water to give'aqueoussprays;

'cidally active materials can be In some cases it maybe desirable to employ the active compounds of the present invention in combination with other fungicides to give compositions that have broad spectrum fungicidal activity. In these mixtures, the fungipresent in any desired amount, ordinarily from about 0.1-20 parts by weight of a compound represented by Formula 1 per part by weight of the auxiliary fungicidally active material. In some instances it may even be desirable to employ two or more auxiliary fungicides.

Typical of the auxiliary fungicides that can be employed in combination with the compounds of the present,

invention are the following: N-trichloro-methylthio-4-cyclohexene-1 ,Z-dicarboximide Tetramethylthiuram disulfide Manganese ethylene-bis-dithiocarbamate Ferric dimethyl dithiocarbamate Zinc ethylene-bis-dithiocarbamate Zinc dimethyl dithiocarbamate ziram) Tetra copper calcium oxychlorid'e Tetrachloro- -benzoquinone (chlor'anil) 2,3 d'ichloro-l,4-naphthoquinone (dichlone) 2-dichloro-6-(-o-chloroanilino)triazine (dy-rene) Ethylene thiuram monosulfide 2-'heptadecyl glyoxalidine acetate (glyodin) Ferric dimethyl dithiocarbam'ate plus Z-mercaptobenzothiazole Manganese dimethyl dithioca-rbamate plus Z-mercaptobenz'othiazole Copper dihydrazinium sulfate Copper-8-quinolinolate Cycloheximide Terramycin Streptomycin In order that the invention maybe better understood, the following examples are given in addition 'to those already set forth above:

EXAMPLE 1 A stirred reaction vessel equipped with an agitator is charged with parts of 2-aminobenzothiazole and 1000 parts of tap water. The pH is adjusted to 3.5 with 37% HCl. The resulting solution is then heated to 50 C. and maintained at this temperature. Commercial methyl chloroformate (244 parts) 'is added over a period of three hours concurrently with 900 parts of 2.72 N

NaOH to maintain pH at 3.5-4.0. During this addition the product precipitates.

After the additions are complete the reaction mass is'held at 50 with stirring for 0.5 hour and then filtered. The product is washed with 2000 parts of hot tap water (50 C.) and vacuum dried at 40 C.

238 parts of 2-carboxyimino-3-benzothiazoline carboxylic acid, dimethyl ester is obtained, melting with decomposition at l40-143 C. Ultraviolet and infra-red analysis show the product to be essentially pure.

Analysis.-Calcd for: C, 49.6%; H, 3.89%; .8, 12.05%; N, 10.51%. Found: C, 49.55%, 49.76%; H, 3.89%, 3.89%;S, 12.21%, 12.42%; N, 10.18%.

A-0.008% by weight water suspension of this compound is'prepared and-applied as a foliarspray to apple foliage infected with established powdery .mildew (Podosphaer'a leucotricha). This treatment gives substantially complete control of the infection.

EXAMPLES 2-5 The following lower alkyl esters are prepared from 150 parts of '2-'aminob'enzothiazol'e in accordance with the procedure of forth inlable I:

Example 1, using the conditions set EXAMPLES 6-44 The following compounds of the present invention are Table I Exlarmple Chloroformate, Parts by Weight Base by Wt., Parts pH Temp. Product ethyichioroformate, 238 parts.-- EUR, 125 parts 3-3. 6 35 2-carboxyimin0-3-benz0thiaz0le carboxylic acid, diethyl ester. sec. zautyl chioroformate, 285 NaOH, 85 parts 3.0 45 di (sec. butyl) ester.

par 5. n-butyl chloroformate, 285 parts. Ca(0H)z, 77 parts 3.0 45 di(u-butyl) ester. n-propyi chioroformate, 268 parts N aczHaO 183 parts 3-3. 5 30-40 di(11-pr0pyl) ester.

The compounds of Table of apple trees, in accord Example 1,gives similar fungicidal control.

I, when applied to the foliage ance with the procedure of also prepared in accordance ample 1 by substituting for the reactants of Example 1 equimolaramounts of with the procedure of Exthe reactants set forth in Table II:

Table II X Example R-X- i-Oi Used Amine used Product obtained 6 aliylchloroiormate 2-am1nobenzothiazoie 2-ciairllaloxyiml ttrio-3 benzothiazoiine carboxylic acid a y es er. 7 'thiolmethylchlordforniate-- do thio1-2-t11iolcarboxyimino-3-benzothiazoiine carboxylic acid dimethyl ester. v 8 thionomethyichloroformate do thi0n0-2-thi0n0carb0xyi111in0-3-be11z0thiazolinecarboxyiic acid dimethyl ester. dithiomethylchloroformate do dithio-2-dithi0carb0Xyin1ino-3 benzothiazoiinecarboxylic acid dimethyl ester. thiolethylchioroformate do thiol-2-thiolcarboxyiminm3-benzothiazoline carbox- Y yiic acid diethyl ester. thionoaliylchloroiormate do thiono-Z-thionoearboxyimino-S-benzothiazolinecarboxylic acid diailyl ester. dithioethylchloroiormate. d0 dithio-2-dithiocarboxyimiuo -3 benzothiazolinecarboxylic acid diethyl ester. dithi butylchloroformate do dithio-Z- dithiocarboxyimino-3 -benzothiamlingggp i 'boxylic acid dibutyi ester. 'isoprupylchlorotormate -do 2-0arboxyimino-S-benzothiaz'olinecarboxylic acid 1 isopropyi ester. I ethylchlorotormate 2-aminobenzoxazole 2-cz zil btixyimino-3 benzoxazolinecarboxylic acid die y es er. thiolmethylchloroformate. do thioi-2-thiolearboxyimino-3-benzoxazoiine carbox-' ylic acid dimethyl ester. thionomethylchloroformate do thiono 2 thionoearboxyimino 3 benzoxazoiinc carboxylic acid dimethyl ester. dithiomethylchiorotormate. do dithio 2 dithiocarboxyimino 3 benzoxazoline carboxylic acid dirnethyl ester. thionoallylchloroiormatedo thiono 2 thionocarboxyimino 3 benzoxazoline carhoxylic acid diallyl ester. methylchioroiormate z-amino-fi-chlcrobenzothiazole. 2 carboxyimiuo 3 (6 chlorobenzothiazoline) I t carboxylic acid dimethyl ester. ethyichloroiormate 2-amino-4-chlorobenzothiazole 2 carboxyimino 3 (4 chlorobenzothiazoline) carboxylic acid diethyl ester. propylchloroformate Z-amino-5-chiorobenzothiazo1e 2 carboxyimino 3 (5 thiolpropylehlorotormate.

' thionobutylchloroi'ormate...

v methylchlorotormate.

;- methyichldrdformate.

thioimethylchloroformate dithiomethyitthloroformate.-

ethylchloroiormate butyichioroformate aliyichloroformatc thiolmethyichioroformate.

2-amino-5, G-dichlorob euzothiazole 2-amino-5-chlorobenzoxazo1e 2-am1no-5, 7-dichlorobenzoxazole chlorobenzothiazoline) carboxylic acid dipropyl ester.

2 carboxyimino 3 (6 fluorobenzothiazoline) dithio 2 dithiocarboxyimino 3 (6 chlorobenzo thiaz0liue)carboxyiic acid dimethyi ester.

thiol 2 thiolcarboxyimino 3 (5 ehlorobenzothi azoline) carboxylic acid dimethyl ester.

2 carboxyimino 2 (6 nitrobenzothiazoiine) car boxylic acid dimethyl ester.

2 carboxyimino 3 (4 nitrobenzothiazoline) ear boxylic acid diethyl ester.

thioi 2 thiolcarboxyimino 3 (5 nitrobenzothi azoline)carboxylic acid dimethyl ester.

thiono 2 thionocarboxyimino 3 (5, 6 dichioro benzothiazolinc)carboxylic acid dirnethyl ester.

dithio 2 dithiocarboxyimino 3 (5, 6, 7 trichloro benzothiazoline)carboxyiic acid dimethyl ester.

dithio 2 dithiocarboxyimiuo 3 (4 chloro 5 nitrobenz0thiazo1ine)carboxylic acid dibutyl ester.

thioi 2 -thiolcarb0xyin1ino 3 (4 nitro 6 chloro benzothiazoiine)carboxylic acid dipropyl ester.

thiono 2 -'thi0nocarboxyimino 3 (4 chloro 5 nitrobenzothiazoline)carboxylic acid dibutyl ester.

2 carboxyimino 3 (5, 6 dichlorobenzothiazoline)- carboxylic acid dimethyi ester.

thiol 2 thiolcarboxyimino 3 (5, 6 dichloroben zothiazoline) carboxyiic acid dimethyl ester.

2 carboxyimino 3 (5 chiorobenzoxazoline) carboxylic acid dimethyl ester.

2 carboxyimiuo 3 (5, 7 dichlorobeuzoxazoline) 2-amino-5-nitrobenzoxazolc 2 amino 5 chloro 7 nitrobenz oxazoie.

azole. 2 amino 4, 5, 7 triehlorobenzoxazole.

carboxylic acid dimethyl ester. thiol 2 thiolcarboxyimino 3 (5 nitrobenzoxaz- 0iine)carboxylic acid dimethyl ester. dithio 2 dithiocarboxylmino 3 (5 chloro 7 uitrobenzoxazoline)carboxylic acid dimethyl 2 carboxyimino 3 (4, 7 dibromobenzoxazoline) carboxyiic acid diethyi ester.

2 carboxyimino 3 (5 fluoro 7 nitrobenzox azoline)carboxylic acid dibutyl ester.

2 carboxyimiuo 3 (4, 5, 7 trichiorobenzoxazo line) carboxylic acid diailyi ester.

(6 iodobenzo 7 EXAMPLE 4s Essentially pure 2-carboxyimino-3-benzothiazolinecarboxylic acid, 3-allyl-2-methyl ester precipitates out of solution.

EXAMPLES 46-69 The compounds in Table III are prepared similarly by substituting e below for 2-benzoth quivalent amounts of the reagents listed iazolecarbamic acid methyl ester and allyl chloroformate of Example above.

EXAMPLE 76 The following wettable powder composition is diluted with water to give a 0.2% concentration of the active ingredient. The resultant composition, when sprayed on tomato foliage, prevents infection by early blight (Alternaria solani).

Percent Thiono 2 t-hionocarboxyimino- 3 (5,6 dich1orobenzothiazoline)carboxylic acid dimethyl ester" 20.0 Sodium lauryl sulf 0 Sodium lignin sulfonate 1.0 Kaolin clay EXAMPLE 77 The following wettable. powder when dispersed in. water at a concentration of 2 pounds per 100 gallons of Table III Example I] Carbamic Acid Ester Used Product Obtained R-X-OO1 Used 46 ethylchloroiormate Q-benzcthiazole carbamle acid, z-earbcxylmlno-tt-benzothlezolinecarboxyllc acidmethyl ester. 3-ethyl-2-methyl ester. 47 propylchloroformete do 2-carboxylmlno-3-benzothiazcllne earboxyllc acld- 3-pr0pyl-2-methy1 ester. 48 butylchlorolormate u 2-carboxyimino-3-benzothlezol1ne .carboxyllc acid- 3-butyl-2-methyl ester. 49 ethylehloroformate 'Z-benzoxazole carbamle acid, 2-carboxylmlno-3-benz.oxazollne .cerboxyllc acid-3- methyl ester. ethyl-z-methyl ester. 50 .propyichleroformate. 2,-carboxylmino-3-benzoxeznllne earboxyllc acid-3- propyl-z-methyl ester. 51 allylehlorotormatem z-earboxylmtno-s-benzoxazoline narbnxyllc acid-3- allyl-Z-methyl ester. 52 methylchlorolormate Z-benzothiazole carbamlc acid, 2-carboxy1mlno-3-benzothlazollne .carboxyllc acidethyl ester. 3-methyl-2-ethy1 ester. 53 propylchloroformate do 2-carboxyimln0-3-henzothlamllne .eerbnxyllc acid- 3-propyl-2-ethyl ester. 54 methylchlorotormate 2-benzoxazole carbamle acid,.ethy1 2-earboxylmlno-B-benzoxazollne .carboxylle acidester. 3-methyl-2-ethyl ester. 55 thiolethylchloroformate.. thlol- 2 -benzothiazole carbamic thiol2-thiolcarboxylmlnoafbenzothtazollne caraeid, methyl ester. boxylic acid-S-ethyl-Z-methyl ester. 56 thlolbutylchloroformate. do thiol-z-thiolcarboxylmino-3-benzothiazoline cerboxyllc acid-3-butyl-2-methyl ester. 57 thionoallylehloroformate.- thi0no-2-benzothlazole carbamle thiono-2-th10noearhoxyiminofl-benzothiazoline car-- aeid..methyl ester. boxyllc acid-3-ally1-2-methyl-ester. 58 thionopropylchloroiormate do thiono-2-thlonocarboxylmlnO-B-henznthlamhne earboxylie acld-3-propyl-2-methyl ester. 59 dithloethylchloroformate dithio-2-benzothiazo1e carbamic dlthlosz-dlthiocarboxylminn-3 benzothtezollne caracid methyl ester. boxyllc acid-3-ethyl-2-methyl ester. 60 dithiopropylchloroformatefl do dithio-2-dithiocarboxylminoa3-benzothlazollne carboxylic acld-3-propyl methyl ester. 61 dithiomethylehloroformate dithlo-z-benzothiazole carbamic dithlo-2dithioearboxylmlnoeiisbenzothlezollne caracid butyl ester. boxyllc acld-3-methyl-2-butyl ester. 62 dithlobutylchloroformate..- --d0 dlthloasdithiocarboxyimlnoeesbenzothtazoline carboxyllc acid dlbutyl ester. 63 thlolethylchloroiormatethiol-Z-benzoxazole earbamic acid thiol-Z-thlolcarboxyiminositfbenzoxazolme carb0xmethyl ester. ylic acid'3-ethyl-2-methy1 ester. 64 thionopropylchloroiormatm. thiono 2 benzoxazole carbamic thlono-z-thionoearb0xyimlno-3-benz0xazollne caracid methyl ester. boxylic acid-3-propyl-2-methyl ester. 65 d1thi0butyleh1oroformatedithio -2-benzoxazole carbamlc dlthic-2 dithloearboxyimino-3-benzoxezollne caraeid methyl ester. boxylic aeid-3-butyl-2-methyl ester. 66 ethylchloroformate 2-(4-nitrobenzothiazo1e) carbarnie 2-carboxyimmo-3-(4-nitrobenzothiazollne)carburacid methyl ester. ylic acld-S-ethyl-Z-methyl ester. 67 methylchloroformateq Z-(et-chlorobenzothiazole)'cerbamie Z-carboxyimlno-3-(49chlornbenzothlaz0lme)carboxacid ethyl ester. ylic aeid-3-methyl-2-ethyl ester. 68 -do 2-(5,fi-dichlorobenzothrazole) car- 2-carboxyimin0-3-(5 6-diehlorobenz0thlez0llne)carbarnic acid allyl ester. boxylic acid-3-rnet yl-Z-allyl ester. 69 butylchloroformate 2-(t-nltro-e-ehlorobenzothiazole) Z-earboxyimino-3-(4-nitro-6-ehlorobenzoth1azollne) earbamic acid methyl ester. carhoxylic aeid-2-methyl-3-butyl ester.

The following list is further illustrative of the 'fungicidally active compounds of the invention.

These compounds are prepared 'by the methods of Examples 1-69 using appropriate reagents. They are formulated into 60 fungicidal compositions and used by substituting them for the active ingredients of the compositions of the above examples.

water and sprayed on tomato foliage at a rate of 100 gallons per acre, prevents early blight (Alternaria solam'). Percent Dithio 2 dithiocarboxyimino 3 -(5 chloro- 7-nitrobenzoxazoline)carboxylic .acid dimethyl ester 80. 0

Alkyl naphthalene sulfonic 'acid sodium salt 0.75 Low viscosity methyl cellulose 0.25 Silica 19.00

EXAMPLE 78 A fungicidal dust composition of (2-carboxyimino-3- (5-fluoro-7-nitrobenzoxazoline)carboxylic acid dibutyl ester) is prepared. When dusted on apple trees at the rate of 10 pounds of active ingredient per acre, powdery mildew 'is controlled (Padosphaera .leucotricha).

Percent 2 carboxyimino 3 (5 fluoro 7 nitrobenzoxazoline)carboxylic acid 'dibutyl ester 20 Stearated calcium carbonate 80 9 EXAMPLE 79 suitable incubation time the leaves are examined for disease. It is found that the treated leaves have no disease while untreated control leaves have 100% disease. The same compound is applied to apple foliage as an aqueous suspension at a concentration of 0.008%. When the spray deposit has dried, the plants are exposed to infection by the spores of apple powdery mildew (Podosphaera leucotricha). After a suitable incubation period it is found that the treated plants have only 10% infection whereas untreated control plants have 100% infection.

The same compound is applied as an aqueous dispersion in a concentration of 10 p. p. m. to sand in which cucumber plants are growing. One week later the cucumber plants are exposed to infection by powdery mildew (Erysiphe cichoracearum). After a suitable incubation period the plants are examined for disease. It is found that treated plants have disease whereas the untreated control plants have 100% disease.

EXAMPLE 80 This compound is formulated for application by means of conventional dusting equipment by blending the listed ingredients together and passing them through a micropulverizer.

Percent 2 carboxyimino 3 benzothiazolinecarboxylic acid methyl ester 25 Pyrophyllite 75 This fungicidal composition, when dusted on tomato plants at a rate of 3 pounds per acre of active ingredient prevents infection by early blight (Alternaria solani).

EXAMPLE 81 2 carboxyimino 3 benzothiazolinecarboxylic acid diethyl ester is formulated as a fungicidal dust having the following composition:

Percent 2 carboxyirnino 3 benzothiazolinecarboxylic acid diethyl ester 20 Tobacco dust 80 This fungicidal dust is prepared by blending the listed ingredients and passing them through a micropulverizer. When the composition is dusted on pear trees at the rate of pounds per acre of active ingredient, it is found to prevent powdery mildew (Podosphaera leucotricha).

EXAMPLE 82 acid diallyl ester 80.00 Alkyl naphthalene sulfonic acid sodium salt 0.75 Low viscosity methyl cellulose 0.25 Silica 19.00

This wettable powder, when dispersed in water at a concentration of 6 pounds per 100 gallons of Water and sprayed on tomato foliage at the rate of 100 gallons per acre, prevents infection by early blight (A lternaria solani) with the spores' of the early blight fungus (Alternaria s0lani). After a as a dust that is suitable 10 EXAMPLE s3 'Ihio-Z-thiolcarboxyimino 3-benzothiazolinecarboxylic acid dimethyl ester is prepared as a wettable powder of the following composition:

. Percent Thiol-2-thiolcarboxyimino 3 benzothiazolinecarboxylic acid dimethyl ester 80.00 Alkylnaphthalene sulfonic acid sodium salt 0.75 Low viscosity methyl cellulose 0.25 Diatomaceous earth 19.00

This wettable powder, when dispersed in water at a concentration of 2 pounds per gallons of water and sprayed on apple trees at a rate of 100 gallons per acre prevents infection by apple scab (Venturia inaequalis).

EXAMPLE 84 Dithio-2-dithiocarboxyimino 3-benzothiazolinecarboxylic acid diethyl ester is prepared as a wettable powder of the following composition:

When dispersed in water at a concentration of 2 pounds per 100 gallons of water and sprayed on tomato foliage at the rate of 300 gallons per acre, early blight is prevented (A lternaria solani).

Additional fungicidal compositions are prepared in accordance with Examples 76 to 84 by replacing the active ingredients of the compositions of these examples with equal part by weight of the compounds of Examples 1 to 75. These compositions, when used in accordance with Examples 76 to 84, give similar fungicidal control.

We claim:

1. A compound represented by the formula wherein Z is selected from the group consisting of hydrogen and nitro; Q is a halogen; n is a whole positive integer of less than 4; X, X X X and X are selected from the group consisting of oxygen and sulfur; and R and R are selected from the group consisting of alkyl and alkenyl radicals containing less than 5 carbon atoms.

2. A compound in accordance with claim 1 in admixture with an inert solid.

3. A compound in accordance with claim 1 in admixture with a surface-active agent.

4. The method for the control of fungi comprising applying to the organic material to be protected, in a fungicidally eifective amount, a compound in accordance with claim 1.

5. The process of preparing a compound of claim 1 comprising introducing into a reaction zone, water as an aqueous reaction medium, a heterocyclic amine hydrochloride and a ehloroformate; maintaining the temperature of the aqueous reaction medium within the range from 20-60" C. during the reaction period; maintaining the aqueous reaction medium at a pH within the range of pH 2.0 to 6.0 during the reaction period; and separating the resultant product that precipitates from the 1 1 reaction medium, said heteroeyclic amine being selected and said chloroformate being, selected from the group from the group represented by the formula represented by the formula N 5 II wherem 531d substrtuent letters have the same srgmficance /C--NH-HC1 as i clafm 1. x No references cited. 

1. A COMPOUND REPRESENTED BY THE FORMULA
 4. THE METHOD FOR THE CONTROL OF FUNGI COMPRISING APPLYING TO THE ORGANIC MATERIAL TO BE PROTECTED, IN A FUNGICIDALLY EFFECTIVE AMOUNT, A COMPOUND IN ACCORDANCE WITH CLAIM
 1. 